What is the complete set of equipment for lime shaft kiln
Lime shaft kiln is an important equipment used for calcining limestone to produce lime, and its structure and working principle determine its key role in lime production. The entire lime shaft kiln equipment consists of multiple key components, each of which plays an indispensable role in ensuring efficient and stable production of lime.
The main structure of a lime kiln is a vertical cylindrical kiln body, usually made of multiple layers of materials such as high alumina bricks, clay bricks, clay insulation bricks, and insulation fiber cotton felt. The selection of these materials aims to provide sufficient fire resistance and insulation performance to ensure a stable and efficient high-temperature environment inside the kiln. The interior of the kiln is divided into a preheating zone, a calcination zone, and a cooling zone from top to bottom. The material falls layer by layer under the action of gravity and passes through these three zones in sequence to complete the transformation from limestone to quicklime.
At the top of the lime kiln, there is a feeding device used to add limestone and fuel (such as coke, coal gas, etc.) into the kiln. The design of the feeding device should ensure that the materials can enter the kiln evenly and stably to avoid local overheating or undercooking. At the same time, in order to optimize the combustion efficiency of fuel, some advanced lime shaft kilns are also equipped with distributors, such as rotating distributors, conch shaped distributors, etc. These distributors can further achieve uniform mixing and reasonable distribution of fuel and limestone.
In the middle and lower part of the kiln body, there is a combustion device used to provide the heat required for calcination. Depending on the type of fuel used, the combustion device can be a solid fuel combustion chamber (such as a coke combustion chamber) or a gas fuel burner (such as a gas burner). Gas fuel has been widely used in modern lime kilns due to its high combustion efficiency and low pollution. The design of the combustion device needs to ensure that the fuel can be fully burned, and the heat generated can be evenly and efficiently transferred to the materials inside the kiln.
The bottom of the lime kiln is equipped with a discharge device, which is used to discharge the calcined quicklime from the kiln. The design of the discharge device should ensure smooth and continuous discharge of quicklime, while avoiding damage to the kiln body. In addition, in order to control the temperature and atmosphere inside the kiln, some lime kilns are also equipped with ventilation devices and exhaust systems to regulate the air flow and composition inside the kiln.
In addition to the main equipment mentioned above, the auxiliary equipment of the lime shaft kiln also includes air caps, fire observation holes, temperature measuring devices, etc. The air cap is used to ensure a uniform distribution of air flow throughout the entire cross-section of the kiln; The fire hole is used to observe the combustion situation inside the kiln; The temperature measuring device is used to monitor the temperature inside the kiln in real time to ensure the stability and controllability of the calcination process.
The complete set of equipment for lime vertical kiln includes kiln body, feeding device, distributor, combustion device, discharge device, ventilation device, smoke exhaust system and other ancillary equipment. These devices work together to ensure efficient and stable production of lime kilns. When choosing a lime shaft kiln, enterprises should comprehensively consider factors such as their own production needs, raw material properties, technology and management level, and environmental protection requirements, and choose the most suitable type and configuration of lime shaft kiln for themselves.
